太久没有做 zoj,对 oj 来说,由于它高度的”黑盒性“(输入数据和答案完全保密),保护自信心是非常重要的.所以我先选择一道非常简单的题目刷起.本题目是一个相当简单的题目,难度系数和求 A+B 相当. 本题,已知一个指针,初始状态指向 N(北),现在对指针做一系列顺时针(C)或者逆时针(A)旋转 90 度的操作,问指针然后指向哪个方向. 由于四个方向形成一个循环,所以很自然的提示出,把四个方向所在的”圆环“展开成一个数组,所有的旋转操作实际上是移动数组内的索引,对索引进行递增或者递减的操作.然…

题目链接:Populating Next Right Pointers in Each Node II | LeetCode OJ Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree? Would your previous solution still work? Note: You may only u…

题目链接:Populating Next Right Pointers in Each Node | LeetCode OJ Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next ri…

Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree? Would your previous solution still work? Note: You may only use constant extra space. For example,Given the following binary tr…

Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be set to NULL. Initially, al…

内存管理方面的知识 基础实例: #include <iostream> #include <stack> #include <memory> using namespace std; struct X { X() { cout << "X() ";} ~X() { cout << "~X() ";} }; struct Y { Y() { cout << "Y() ";} ~…

我喜欢去ZOL找一些动漫壁纸当作桌面,而一张一张保存显然是太慢了. 那怎么办呢,我们尝试使用简单的爬虫来解决这个问题. 0. 本爬虫目标 抓取给定分类「或子分类」网址的内容 分析并得到每个分类下的所有图片专辑 下载每一个专辑中的图片「每一个专辑对应一个文件夹」 1. 必要的分析 我们打开浏览器,输入http://desk.zol.com.cn/,跳转到ZOL壁纸的首页. 右键 -> 查看源代码 大致浏览一下都有什么东西 我们可以了解到,需要下载一张图片,我们需要选择一个专题 进入专题后,我们通过…

Populating Next Right Pointers in Each Node Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next…

Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be set to NULL. Initially, al…

METHOD 1: Consider the case where we do not know the number of elements in each row at compile time, i.e. both the number of rows and number of columns must be determined at run time. One way of doing this would be to create an array of pointers to t…

题目: Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree? Would your previous solution still work? Note: You may only use constant extra space. For example, Given the following bina…

题目: Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be set to NULL. Initially…

C# unmanaged function pointers for iOS Just a reminder to myself when I need this thing next time for making Unity work with native code: delegate method should be static to please AOT compiler required for iOS method should have have [MonoPInvokeCal…

Populating Next Right Pointers in Each Node II Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree? Would your previous solution still work? Note: You may only use constant extra s…

Populating Next Right Pointers in Each Node Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next…

Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be set to NULL. Initially, al…

题目来源 https://leetcode.com/problems/populating-next-right-pointers-in-each-node/ Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If th…

Populating Next Right Pointers in Each Node OJ: https://oj.leetcode.com/problems/populating-next-right-pointers-in-each-node/ Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next…

http://www.drdobbs.com/lock-free-data-structures-with-hazard-po/184401890 memory deallocation  lock-free session.h /* * WT_HAZARD -- * A hazard pointer. */ struct __wt_hazard { WT_PAGE *page; /* Page address */ #ifdef HAVE_DIAGNOSTIC const char *file…

Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree? Would your previous solution still work? Note: You may only use constant extra space.   For example,Given the following binary…

该文介绍了如何使用指针中一些未使用的位来隐藏一些数据. When we write C code, pointers are everywhere. We can make a little extra use of pointers and sneak in some extra information in them. To pull this trick off, we exploit the natural alignment of data in memory. Data in mem…

Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be set to NULL. Initially, al…

LeetCode:Populating Next Right Pointers in Each Node Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node,…

Computer Science An Overview _J. Glenn Brookshear _11th Edition An alternative to storing a heterogeneous array in a block of contiguous memory cells is to store each component in a separate location and then link them together by means of pointers.…

Computer Science An Overview _J. Glenn Brookshear _11th Edition Many modern programming languages include pointers as a primitive data type. That is, they allow the declaration, allocation, and manipulation of pointers in ways reminiscent of integers…

题目: Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be set to NULL. Initially…

Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be set to NULL. Initially, al…

Problem Link: http://oj.leetcode.com/problems/populating-next-right-pointers-in-each-node-ii/ OK... Exactly same to Populating Next Right Pointers in Each Node.…

Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be set to NULL. Initially, al…

Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be set to NULL. Initially, al…